Lead End-to-End Performance Engineer

Lead End-to-End Performance Engineer Job Requisition ID: 20588 Date Posted: 15 July 2026 Closing Date: 4 September 2026 23:59 CET/CEST Publication: Internal & External Type of Appointment: 4 years, extendable to indefinite Directorate: Earth Observation Programmes Workplace: Noordwijk, NL Grade Band: A2 - A4 Location ESTEC, Noordwijk, Netherlands Description Alpstar is an ERS-EO project to develop a federated, resilient Earth observation system combining space and ground assets. It provides secure, timely and sovereign data access for civil, security and defence applications. Within this context, the Lead End-to-End Performance Engineer will play a central role in ensuring the technical end-to-end coherence and performance of the Alpstar system, with particular emphasis on the definition, verification and validation of interfaces between the space segment, the ground segment and operational elements within the Alpstar Cluster. In your role as Alpstar Lead End-to-End Performance Engineer, you will report directly to the Alpstar Project Manager. You will collaborate with a range of engineering disciplines, including satellite engineering, security engineering, mission analysis, ground segment engineering and satellite operations. You will also interface directly with the end users to capture needs, discuss performance and address any non-compliance, and to support operational validation and transition to operations.Duties Your tasks and responsibilities will include: • defining and maintaining the end-to-end system performance requirements, including allocation to subsystems, performance budgets, relating for example to latency, availability, throughput and tasking responsiveness, and the performance model, in accordance with mission requirements and the space segment design; • supporting the Alpstar Users Forum with respect to mission and instrument performance aspects and mission data product definition, ensuring that end-to-end performance requirements are consistent with the approved concept of operations; • establishing and maintaining the end-to-end system architecture and operations concept in accordance with mission requirements and the space segment design; • coordinating the end-to-end system performance verification programme, including data processing, flight calibration and characterisation, payload science and ancillary data, in coordination with the respective ground and space segment engineering teams, pre-flight and during in-flight commissioning; • reviewing the consistency and flowdown of the requirements from space segment system level to subsystem and unit level, as well as the internal and external interfaces, while ensuring traceability and coherence with mission requirements and technical and programmatic constraints; reviewing and maintaining the requirements database; and preparing, reviewing, maintaining and supporting the VCD; • analysing and validating the performance of interfaces between space segment and ground segment components (national nodes, national operations centres, the federation layer and processing, archiving and dissemination services) and supporting interface harmonisation with external systems and contributing national or partner infrastructures; • supporting the implementation of the end-to-end mission simulator as applicable, the ground prototype processor, and the verification of the mission products; • supervising the industrial supplier's progress in developing and implementing the Alpstar Federated Layer and Generic Node of the Alpstar Participating States, including their interfaces with space resilience nodes and EOGS, and providing technical support for all industrial activities relating to system and ground segment development; • monitoring the end-to-end data flow, through the instruments/payload and spacecraft subsystems, up to the final data products, ensuring availability of all required models and tools; • coordinating the various project engineering domains in support of the systems engineering function; • providing regular reporting to project management on all aspects of competence, identifying risks and problem areas and proposing mitigation actions, where appropriate; • contributing to the management of the schedule and proposing schedule risk mitigation actions; • potentially assuming responsibility, delegated from the Alpstar Project Manager, for programmatic aspects, and directly interacting with delegations and partners as required. Technical competencies Solid knowledge of space systems engineering principles and lifecycleExperience in software systems engineering, from requirements engineering to design and development and verification and validationExperience with ground segment architectures, mission operations and data processing chainsProven ability in interface engineering and management (ICDs, data flows and operational interfaces)Familiarity with end-to-end system verification and validation involving space and ground elementsKnowledge of ESA system engineering standards, reviews and processesKnowledge of dual systemsBehavioural competencies Result Orientation Operational Efficiency Fostering Cooperation Relationship Management Continuous Improvement Forward Thinking For more information, please refer to ESA Core Behavioural Competencies guidebook Education and professional experience A master’s degree in engineering or a related discipline is required for this post, together with four years of relevant professional experience. Alternatively, candidates with a bachelor’s degree, complemented by an additional four years of relevant professional experience, may be considered.Additional requirements • Knowledge of handling restricted or classified information; • Ability to work in multi-disciplinary and international environments; • Strong communication skills, enabling effective interaction with engineering, ground segment and operations teams; • Ability to work in a fast-paced, project-driven environment, set priorities and present solutions clearly; • Strong interpersonal, communication, technical, analytical, organisational and reporting skills; • A proactive attitude, with a problem-solving mindset and an interest in innovative technologies. Diversity, Equity and Inclusiveness ESA is an equal opportunity employer, committed to achieving diversity within the workforce and creating an inclusive working environment. We therefore welcome applications from all qualified candidates irrespective of gender, sexual orientation, ethnicity, religious beliefs, age, disability or other characteristics. At the Agency we value diversity, and we welcome people with disabilities. Whenever possible, we seek to accommodate individuals with disabilities by providing the necessary support at the workplace. The Human Resources Department can also provide assistance during the recruitment process. If you would like to discuss this further, please contact us via email at contact.human.resources@esa.int. Important Information and Disclaimer In principle, recruitment will be within the advertised grade band (A2-A4). However, if the selected candidate has less than four years of relevant professional experience following the completion of the master’s degree, the position may be filled at A1 level. Applicants must be eligible to access information, technology, and hardware which is subject to European or US export control and sanctions regulations & eligible to acquire the security clearance by their national security administrations. During the recruitment process, the Agency may request applicants to undergo selection tests. Additionally, successful candidates will need to undergo basic screening before appointment, which will be conducted by an external background screening service, in compliance with the European Space Agency's security procedures. Note that ESA is in the process of transitioning to a Matrix setup, which could lead to organisational changes affecting this position. The information published on ESA’s careers website regarding working conditions is correct at the time of publication. It is not intended to be exhaustive and may not address all questions you would have. Nationality and Languages Please note that applications are only considered from nationals of one of the following States: Austria, Belgium, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Slovenia, Spain, Sweden, Switzerland, the United Kingdom and Canada, Cyprus, Latvia, Lithuania and Slovakia. According to the ESA Convention, staff shall be recruited on the basis of their qualifications, taking into account an adequate distribution of posts among nationals of the Member States. The working languages of the Agency are English and French. A good knowledge of one of these is required. Knowledge of another Member State language would be an asset. Who we recruit » Recruitment Process » What we offer » Life at ESA » FAQ »